Unpack the downloaded .zip file. The download comes with a lot of instructions for what you need to do. Most of them turn out to not be required.

Enter the directory where you unpacked the zip and unpack the driver code.

tar -jxvf DPO_GPL_RT5592STA_LinuxSTA_v2.6.0.0_20120326.tar.bz2

Enter the new directory and start make

make

This runs for a while and then fails due to a missing /tftpboot directory. This does not seem to be relevant since the correct file is made anyway.

Now install the driver.

sudo make install

The installation instructions tells you to edit a /etc/rc.d/rc.local file. Since I didn't have neither the file or directory I just skipped this step and rebooted.

After the reboot everything seems to work. Ubuntu automatically found the card and it is what I am using now. Since I have only been using it for 10 minutes I don't know how stable it is but hopefully it will be ok.

Note: I found that I had to have my Ethernet unplugged and then restart Ubuntu for this to take. Otherwise works great.

I was having the same problem and emailed Asus about the should support the 3.x kernel and they wrote back saying that they have forwarded the email the their tech team.

Anyway I was doing a bit more research into the matter and found a post on the Arch Linux forums. A user there posted a patch to get it working on a 3.x Linux kernel, I have tested it and so far all is functional with a couple of hours of light usage.

Here is the link to the patch file, just apply it to the Linux drivers from the Asus website.

Yes, I have the same problem. It freezes for me on 12.10 as well. I haven't had time to investigate further yet. Since Linux is supposed to be supported it might be worth while sending a support request to Asus.
–
oyseDec 4 '12 at 19:48

I have registered a support ticket with Asus now and will report back if they say anything usefull.
–
oyseDec 4 '12 at 20:03

1

I got a response from Asus saying only kernel version 2.6.x is supported and that newer kernel version might be incompatible and that they do not have any timeline for when a new driver will released. In other words the solution is probably to downgrade Ubuntu version (not something I am willing to do) or get a new wireless card :(
–
oyseDec 9 '12 at 15:58

When I followed the instructions here, the driver installed and allowed me to connect to my router for about two seconds then I got a kernel panic and had to do a hard reset to recover.

Here are the differences in the steps that I took and it worked like a charm:

Downloaded the drivers from ASUS's website (did not use from CD) even though it looked like the same version.

I used sudo make (instead of just make) and it compiled without the errors mentioned above. (not sure if this matters but when I ran just make, it error-ed out at the end. I ran sudo make and it completed.

I then ran sudo make install. After that completed, I rebooted and it's been stable after a few reboots.